PC won't boot after installing Graphics Card

Armlesshobo · Apr 29, 2013

Hi,

I'm building my first full PC and I'm having a little trouble, I was wondering if someone could help. First, my specs:

Intel i3 3220
MSI H61M-P31 Mobo
4GB Corisar Vengance RAM
VTX3D AMD Radeon 7850 1GB
Corisar CX430w Modular PSU
Windows Vista

I built the PC minus the graphics card and it was booting fine, everything was working as it should. When I put the graphics card in, the computer wouldn't boot, that is it wouldn't even make it to the POST screen. The PSU and CPU fans would move ever so slightly, but after that it would die.

I've done a quick search on the forums but haven't found a concrete solution, would anyone be able to advise me on what they think the problem is?

Cheers

Guest · Apr 29, 2013

Armlesshobo :

Personally, 430W seems a little low. A 500W or greater PSU is pretty much minimum according to the AMD site. Make sure that you have plugged in all the cables correctly. Make sure that the GPU is receiving power from the PSU.

bkoop · Apr 29, 2013

The 7850 I saw has two six pin connectors on the end, did you plug those in?

splinter007 · Apr 29, 2013

The most likely cause is that your power supply is not powerful enough.

Armlesshobo · Apr 29, 2013

Thanks for the reply guys.

The 7850 I saw has two six pin connectors on the end, did you plug those in?

I just double checked, there's definitely only one. Perhaps that was the 2GB model you seen.

What size of PSU would you suggest? I am also running a HDD, but will be installing a DVD R/W and SDD within the next couple of weeks.

splinter007 · Apr 29, 2013

I own 600W PSU and it powers:

1 SSD
2 HDD's
1 DvD drive
i5-3570k
GTX 670 FTW graphics card
7 case fans
2x4GB Corsair Vengeance RAM

I know every rig is different but that should give you a rough idea.
Definitely 600w will suit you fine. 650w to be safe.

Guest · Apr 29, 2013

You really need to consider 500 watts or more. Or 600 watts or more to be safe. No cheap crap will suffice if of course you want to be safe as you could actually end up spending more money replacing PSUs if they're no good. Get a PSU from a good, reputable brand such as Corsair. Make sure to buy a PSU with at least 80%+ efficiency.

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PC won't boot after installing Graphics Card

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